true, speed is not that important we can leave with the 350 cruise speed, but I keep my mind that the green engine looked way better, but Jinx alrady explain the changes so lets see where this gets to
/edit: also I dont really see whats the problem of the green engine clipping the ship, I mean it is smoke so smoke can go like around the ship and get up there and yeah I do not know how to explain in english =P it would look worse if it was a bretonian egine clipping the ship, but if it is just smoke, yeah smoke is smoke xD